<link rel="import" href="../bower_components/polymer/polymer.html">
<dom-module id="my-input">
	<script>
		MyInput = Polymer({
			is: 'my-input',
			extends: 'input',
			created: function() {
				// 我们扩展组件的外观使之变成红色边框
				this.style.border = '1px solid red';
			}
		});
	</script>
</dom-module>